The term "efficiency" refers to the ability of a speaker system to convert electrical energy (power from the amplifier) into acoustic output.
术语“效率”是指扬声器系统将电能（功放的推力）转化为声音输出的能力。
Mode conversion efficiency has been calculated as functions of acoustic frequency, interaction length, guiding layer thickness, and acoustic drive power density.
模式转换效率可化作声波频率、声光作用长度、波导厚度和声波功率密度的函数，并利用数值计算得出结果。
The environmental responsibility is assumed by simple architectural devices for acoustic and visual comfort, and to achieve greater efficiency in the consumption of water and energy.
简单的建筑设备承担了环保责任，达到声觉和视觉的舒适，并在能源和水的消耗上实现了更高的效率。
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